The motor/blower was from a 50K btu gas furnace, so it moves a lot of air. I usually open my basement doors and turn on the fan. The fan is behind my table saw and maybe 20 feet from the doors.
If I'm sanding small stuff, I will do it on the top of the fan unit.
When I'm using the table saw or router table, there still seems to be sawdust that gets in the air, even though I have my big vac running (4" hoses) connected to the machine. This fan picks up a lot of dust, based on how dirty the filters get.
I got the blower free, so it cost very little to build. Left over plywood, some casters, a little wiring stuff.
Heat and air contractors have old units all the time when they change out units. While I got this one when I changed out the heating system at my Mother's condo, I built another one for a friend and got that blower by just asking.